Finding the Fourth Proportional to 7,191.72, 10,788.32 and 1,997.60

Step by Step Solution

1. Step 1: Write the proportion equation
   7,191.72 : 10,788.32 = 1,997.60 : x
2. Step 2: Convert to fraction form
   7,191.72/10,788.32 = 1,997.60/x
3. Step 3: Cross multiply
   7,191.72x = 10,788.32 × 1,997.60
4. Step 4: Simplify right side
   7,191.72x = 21,550,748.03
5. Step 5: Solve for x
   x = 21,550,748.03/7,191.72
6. Step 6: Final answer
   x = 2,996.61